/******************************************************************************
 * Copyright (C) 2015  671643387@qq.com
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 *****************************************************************************/

#ifndef UCOP_CRYPTO_SHA1_H_
#define UCOP_CRYPTO_SHA1_H_

#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif

#include <string>
#include <cstdint>
#include <openssl/sha.h>
#include <openssl/crypto.h>
#include "Ucop/Macros.h"


namespace Ucop {
namespace Crypto {
		class BigNumber;

		class Sha1Hash
		{
		public:
			Sha1Hash(void);
			~Sha1Hash(void);

		public:
			void Initialize(void);
			void Finalize(void);

			void UpdateBigNumbers(BigNumber*, ...);
			void UpdateData(const std::uint8_t*, std::size_t);
			void UpdateData(const std::string&);

			const std::uint8_t* digest(void) const { return &_Mydigest[0]; }
			int length(void) const { return SHA_DIGEST_LENGTH; }

		private:
			SHA_CTX         _Myctx;
			std::uint8_t    _Mydigest[SHA_DIGEST_LENGTH];
			DISALLOW_COPY_AND_ASSIGN(Sha1Hash);
		};

}}

#endif /* UCOP_CRYPTO_SHA1_H_ */
